Generator



L. A. DARLING GENERATOR Mar. 6, 1923. 1,447,282

Filed Apr. 50, 1919 2 sheets-sheet 1 %/Lewz's 15C Dari n WW Mar: 6, 1923. 1,447,282

L. A. DARLING GENERATOR 2 sheets-sheet 2 Filed Apr. 50, 1919 FIG: I

Lewis A. Darling,

Patented Mar. 6, 1923.

"U N I T E D TA TES P A TEN T Q'F F'l'C E LEWIS A. DARLING, or rnxn'nnnnrizrn, rznn'synvnm'ifn, Atsremm To ELECTRIC SERVICE SUPPLIES coarrm,'or rmLADnLPHIA, PENNSYLVANIA, A CORPORA- rmn or PENNSYLVANIA.

' GENERATOR.

Application filed April 30,1919. storm. $3,764.

To all 'w/wm it may concern:

lie it known that 1, Lewis A. IIA un'NG,

a citizen of the United States, residing in the city and county of Philadelphia, and 5 State oi? Pennsylvania, have invented certain new and useful lmprovements inGe nez'ators, whereof the following is a specification, reference being had to the acconip'aiiyin drawings.

My invention relates to generators 'for turbo-generator units such as are used'on locomotives to furnish current to the headlight, and. more particularly to the structure and parts of motors and generators which are associated with their commutators and terminals, including brushholder mounting and construction. t is my aim to renfderthe parts mentioned readily and conveniently zu-cessible, adjustable, or removable for any purpose, well as to provide for their enclosure and protection while in operation. I also aim to secure ruggedness, durability, simplicity of construction, and ease and cheanness of i'nanitifacturej How "all the fort ingr and other advantages can be rea ed in connection with my invention will appear from the descriptionhereinafter of the best form of embodiment at present known to me, while its scope and essentials will be indicated in my claims.

The invention is especially advantageous under the severe operating conditions of power ;11 ator sets for supplying electric current to steam locomotive headlights, both in respect of the vibration and swaying of the locomotive. and by reason of their being rally) mounted ontop of the locomotive bo' exposed to sulphurous gases and to cinder-laden smoke. Most of the features me tioned above are, it will be seen. of spe- (23.1 inmortance in such sets, in view of the heat and general. inconvenience under which re: operations on them must otten be carried out.

ln the drawings. Fig. 1. shows a longitudinal section through a generator constructrilance with my invention. and

adapted for a locomotive headtnrhdgenerator set. an end view of the generator 0 parts associated with the COXIIIIIIP tutor exposed by the breaking away of an outer cover.

U1. is a perspective view of certain parts of a brush holder of my invention.

As shown in "Fig;l thegener'ator frame or casing 1, is attacl'i'ed at'one'end to the tato r is a supporting structure 6, having the form of an irregularly pan-like diaphragm plate with jeriiiheral flange 7, seated in theimter end oi the casingl, against its internal fianljfe '8, and detaehably secured (see Fig. II) by means of acouple of screws '9, that'take into lugs on the casing 1. This diaphragm 6. has outward extenclingrecess portions 10,'that' accommodate the poles and field coils of the, generator. As shown, the shaft 2, has no'oiitboard bearing, so that the commutator is overhung with respect to the bearing 3. which'is thus the outermost bearing at this end of the shaft.

On tli'e outer sideof the diaphragm 6, are in'siilatively mounted and carried thebrush holders '12. each firmly and rigidly secured to the diaphragm by two screws 13,

extendingthrough holes 14, 14, in the main br lsh-holder members. As shown, each hrush holder 11. is insulated from the diaphragm '6. by means of an interposed dilate of insulating fibre of the same (see Fig. Ill) has guiding means 17, for the longitudinally sliding rectangular carbon brush '18. and the brush 13. is urged endwise against thecomin utator 5. by a coiled fiat spring 11). that acts cahtilevenwise on the outer end of the brush. ..;\.t the center of the shrine 19. is a polygonal. holding part 20. main holder member 11. and the part 20. have correlative anti-turnin $1 engagement means hereshown as consisting of the hexagonally polygonal end of the part 20. and a corresponding polygonal socket '21, in said main holder member. and the part 20, is secured to the main holder member by a crew 22, with its ends engaged in the socket 21. The inside or fixed end of the spring 19,

being engaged in a notch 23, in the part 20, the tension of the spring and its pressure on the brush 18, can be adjusted by merely backing outthe screw 22, sufficiently to permit the engagement means at 21, to be released so that the part 20 may be turned 60 or a multiple angle. The brush 18, it will be seen, is positively connected to the main brush holder member 11, by a flexible lead 25, on the brush and a binding screw 26, taking into the member 11.. The flexible field lead 27, of the brush 18, is also fastened to the binding screw 26, being held in proper position by a screw-fastened clip 28, and penetrating the diaphragm 6, through the ventilating opening 29, near its upper edge. I

Near the lower edge of the diaphragm 6, are mounted. on the outer side thereof the main generator terminals 30, with their binding means 3l,these terminals 30, havin connecting means 32, at the inner side of the diaphragm. lhe brush holder 12, is connectedto one of these terminals by the flexible lead 33.

It will be seen that the diaphragm form of the supporting structure 6, substantially closes off or occludes this end of the motor casing and effectually prevents entrance of large cinders into the generator. Provision for enclosing and protecting the parts on the outer side of the diaphragm 6, is made by means of a cover 34, that practically closes this whole end of the generator casing 1; thiscover 3a, is pivotally mounted on the casing l, at 35, independently of the diaphragm 6, so as to be readily swung open to a position where it will expose said parts and not interfere with removal of said dia phragm. lit is normally held closed through the instrumentality of engagement means 36, on the diaphragm. Thus the brushes l8, and terminals 30, are readily accessible on the outer side of the structure 6, the moment the door-like cover 34:, is opened, and are freely removable along with the readily removable structure *8, upon the detachment of i the latter from. the casing 1,the current leads being, of course, detached, as usual, if the brushes, etc, are to be removed altogether, and being made of just sufficient length to permit said structure to be lowered out of the way without detachment of any of them, if only access to the armature or the fields, vto, be desired. This cover 34, affords the parts inside it good protection, since its principal opening is that at is bottom at 38, which permits ventilation and accommodates the main generator leads from the terminals 30.

To facilitate removal and replacement of the diaphragm 6, with the brushes 18, etc, it is advisable to disengage the tension springs 19, from the outer ends of the brushes by lateral fiexure (without detachment), after which the free spring ends may rest on the edges of the guide meanslY, 17, where they will press laterally against the brushes just sufiiciently to keep the brushes from slipping inward in the guide means.

Certain features of the construction here in shown, involving the mounting of the armature 4: on its shaft 2, and its relation to the diaphragm 6 and the commutator 5, are not here claimed, for the reason that they form the subject matter of my application Serial No. 293,763, filed concurrently with this application.

Having thus described my invention, I claim: I

1. In a turbo-generator, an open-ended generator casing, a shaft having an unsupported end extending into the casing toward the open end, an armature and commutator carried by the shaft so as to locate the conr mutator for ready access through said casing opening, a diaphragm removably fitted within the casing opening and having a central opening through which the commutator extends in closely spaced relation to the edges of the diaphragm opening, brushes mounted on the diaphragm, and a door carried by the casing to close the end of the latter, whereby the diaphragm may be read ily removed carrying the brushes there-with to expose the armature.

2. In a turbo-generator, an open ended generator casing, a shaft having an unsupported end extending into the casing toward the open end, an armature and commutator carried by the shaft so as to locate the commutator for ready access through said casing opening, an annular shoulder formed around the inner wall of the casing, a diaphragm seated against the shoulder and having a centralopening through which the commutator extends in closely spaced relation, brushes mounted on the outer face of the diaphragm, and a door hingedly carried by the casing entering the end thereof to form. aclosure and seating against the edge of the diaphragm.

In witness whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this 25th day of April 1919.

LEWIS A. DARLING.

Witnesses:

James H. BELL, E. L. FULLERTON. 

